检索结果-南通市图书馆

Chemical Scissors Tailored Nano‑Tellurium with High‑Entropy Morphology for Efficient Foam‑Hydrogel‑Based Solar Photothermal Evaporators

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第3期16卷 149-168页

作者： Chenyang Xing Zihao Li ziao wang Shaohui Zhang Zhongjian Xie Xi Zhu Zhengchun Peng State Key Laboratory of Radio FrequencyHeterogeneous Integration Shenzhen UniversityShenzhen 518060People’s Republic of China Center for Stretchable Electronics and NanoSensors College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China School of Science and Engineering The Chinese University of Hong KongShenzhenShenzhen 518172People’s Republic of China Institute of Pediatrics Shenzhen Children’s HospitalShenzhen 518038GuangdongPeople’s Republic of China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060People’s Republic of China

The development of tellurium(Te)-based semiconductor nanomaterials for efficient light-to-heat conversion may offer an effective means of harvesting sunlight to address global energy ***,the nanosized Te(nano-Te)materials reported to date suffer from a series of drawbacks,including limited light absorption and a lack of surface ***,we report the preparation of nano-Te by electrochemical exfoliation using an electrolyzable room-temperature ionic ***,cations,and their corresponding electrolytic products acting as chemical scissors can precisely intercalate and functionalize bulk *** resulting nano-Te has high morphological entropy,rich surface functional groups,and broad light *** also constructed foam hydrogels based on poly(vinyl alcohol)/nano-Te,which achieved an evaporation rate and energy efficiency of 4.11 kg m^(−2)h^(−1)and 128%,respectively,under 1 sun ***,the evaporation rate was maintained in the range 2.5-3.0 kg m^(−2)h^(−1)outdoors under 0.5-1.0 sun,providing highly efficient evaporation under low light conditions.

关键词： Tellurium High entropy Electrochemical modification Solar absorption Evaporation rate

A deep learning-based approach for flow field prediction in a dual-mode combustor

在线全文

学校读者我要写书评

暂无评论

Propulsion and Power Research 2024年第2期13卷 178-193页

作者： Chen Kong ziao wang Fuxu Quan Yunfei Li Juntao Chang Harbin Institute of Technology Harbin 150001China

Accurate acquisition of the distribution ofﬂow parameters inside the supersonic combustor is of great signiﬁcance for hypersonicﬂight *** is an interesting attempt to introduce a data-driven model to a supersonic combustor forﬂowﬁeld *** paper proposes a novel method for predicting theﬂowﬁeld in a dual-mode combustor.Aﬂowﬁeld prediction convolutional neural network with multiple branches is *** investiga-tions for a strut variable geometry combustor have been conducted to obtainﬂowﬁeld data for training the network as aﬂowﬁeld prediction ***ﬂowﬁeld data are obtained by changing the equivalent ratio,incomingﬂow condition and geometry of the supersonic *** Mach number distribution can be obtained from the trainedﬂowﬁeld predic-tion model using the combustor wall pressure as input with high *** accuracy ofﬂowﬁeld prediction is discussed in several ***,the combustion mode detection is im-plemented on the predictionﬂowﬁeld.ª2024 The *** services by Elsevier *** behalf of KeAi Communications ***.

关键词： Flowﬁeld prediction Deep learning(DL) Convolutional neural networks(CNNs) Data-driven model Dual-mode combustor Variable geometry combustor

Effect of expansion waves on cowl shock wave and boundary layer interaction in hypersonic inlet

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Propulsion and Power Research 2024年第1期13卷 80-97页

作者： Guangwei Wu ziao wang Teng Shi Zhibin Zhang Weiyu Jiang Fuxu Quan Juntao Chang Harbin Institute of Technology Harbin 150001China Xi’an Aerospace Propulsion Institute Xi’an 710100China Beijing Power Machinery Institute Beijing 100074China

The interaction of cowl shock wave and boundary layer has a crucial effect on the stability,operability and performance of hypersonic *** studies on inhibiting the sep-aration and managing the strength of the interaction of the shock wave and boundary layer with expansion corner have been ***,the expansion waves near the circular arc shoulder to effectively control the interaction and cowl shock arrangement is little ***,the interaction of the cowl shock wave and boundary layer under thefluence of the expansion waves is studied by inviscid and viscous numerical *** results reveal that the expansion waves have an important impact on the interaction between the cowl shock wave and boundary layer and the strength of shock wave,and that there are four types of inter-action processes with the change of the relative impingement positions of cowl shock *** expansion waves have a different influence on the shock wave and boundary layer inter-action at different incident *** the incident point of the cowl shock wave goes far downstream from the end of the circular arc shoulder,the influence of expansion waves is weakened,and the magnitude of separation zone ***,when the expansion waves are applied to the interaction of the cowl shock wave and boundary layer on the circular arc shoulder,the separation can be effectively *** particular,while the expansion waves interact with the shock wave and boundary layer in the back half of the circular arc shoulder,the separation is best *** with the upstream and downstream inci-dent points,the scale of separation area in the optimal control region is reduced by 65.3%at ***,the total pressure recovery coefﬁcientﬁrst increases and then decreases when the cowl moves from upstream to downstream,and the total pressure recovery coefﬁcient reaches the maximum value of 68.36%at the incident position of cowl shock wave d Z 8.09d0.

关键词： Boundary layer Expansion waves Cowl shock wave Separation Hypersonic inlet Circular arc shoulder Inviscid and viscous numerical simulations

Symmetric Variation of Monomers for Constructing 1D/2D Imine-Based Covalent Organic Frameworks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第4期6卷 941-952页

作者： Pengzhong Shi Kai wang ziao Chen Jiawei wang Kaifu Lin Ngangnseh Leboh Solange Yanfeng Yue Zhiyong Guo College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108 Department of Chemistry Delaware State UniversityDoverDelaware 19901

Synthetic control of topology connectivity is the crowning achievement for covalent organic framework(COF)*** a large number of one-,two-,and three-dimensional(1D,2D,and 3D)COFs have been reported,their topology structure constructions are restricted to the use of symmetric monomers with the purpose of increasing the crystallinity and/or ***,three imine-linked COFs with different topology nets(namely,sql-b and sql-c)were constructed by symmetric variation of monomers via the condensation of a tetra-amine monomer with a D2h-symmetry and lower C_(2v)-symmetric dialdehyde monomers,bearing a phenolic hydroxyl group at different *** results indicated that a reasonable introduction of the phenolic hydroxyl group could effectively tune the topological structure of COFs at the molecular level during the crystallization ***,the remarkable difference in the dye uptake ability between these COF materials indicated that the fabricated specific pore geometries,as well as different steric hindrance and H-bonding interactions,played a pivotal role in accessing molecules in the ***,this work might boost the explorations of COF materials with expected topologies and pore geometries from conventional monomers through bottom-up synthesis methodology by molecular designing and engineering.

关键词： covalent organic framework topology/dimension regulation molecular symmetry substituent effect molecular sieving

RNA interference reveals chloride channel 7 gene helps short-term hypersalinity stress resistance in Hong Kong oyster Crassostrea hongkongensis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2024年第4期42卷 1261-1271页

作者： Yeshao PENG ziao CHEN Qiong DENG Zhen JIA Lingxin KONG Peng ZHU Youhou XU Zhicai SHE Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation Pinglu Canal and Beibu Gulf Coastal Ecosystem Observation and Research Station of GuangxiCollege of Marine SciencesBeibu Gulf UniversityQinzhou 535011China

The chloride channel 7 gene(CLC 7)of the Hong Kong oyster Crassostrea hongkongensis was cloned and named ChCLC *** cDNA was 2572 bp in length,with a 5′non-coding region containing 25 bp,a 3′non-coding region containing 327 bp,and an open reading frame of 2298 *** 7 has 96.8%and 92.1%homology with CLC 7 of Crassostrea gigas and Crassostrea virginica,respectively,and it was clustered with CLC 7 of *** and ***-PCR showed that ChCLC 7 was expressed in all eight tissues,with the highest in adductor muscle and second in *** ChCLC 7 expression pattern in gill was altered significantly under high salinity stress with an overall upward and then downward *** RNA interference,the expression of ChCLC 7 and survival rate of oyster under high salinity stress was reduced significantly,and so did the concentration of hemolymph chloride ion in 48-96 h after RNA *** believed that ChCLC 7 could play an important role in osmoregulation of *** by regulating Cl^(-)*** study provided data for the analysis of molecular mechanism against oyster salinity stress.

关键词： Crassostrea hongkongensis chloride channel 7 salinity stress RNA interference

Modeling urban redevelopment:A novel approach using time-series remote sensing data and machine learning

在线全文

学校读者我要写书评

暂无评论

Geography and Sustainability 2024年第2期5卷 211-219页

作者： Li Lin Liping Di Chen Zhang Liying Guo Haoteng Zhao Didarul Islam Hui Li ziao Liu Gavin Middleton Center for Spatial Information Science and Systems George Mason UniversityFairfaxVA22030USA Department of Geography and Geoinformation Science George Mason UniversityFairfaxVA22030USA

Accurate mapping and timely monitoring of urban redevelopment are pivotal for urban studies and decisionmakers to foster sustainable urban *** mapping methods heavily depend on field surveys and subjective questionnaires,yielding less objective,reliable,and timely *** advancements in Geographic Information Systems(GIS)and remote-sensing technologies have improved the identification and mapping of urban redevelopment through quantitative analysis using satellite-based ***,challenges persist,particularly concerning accuracy and significant temporal *** study introduces a novel approach to modeling urban redevelopment,leveraging machine learning algorithms and remote-sensing *** methodology can facilitate the accurate and timely identification of urban redevelopment *** study’s machine learning model can analyze time-series remote-sensing data to identify spatio-temporal and spectral patterns related to urban *** model is thoroughly evaluated,and the results indicate that it can accurately capture the time-series patterns of urban *** research’s findings are useful for evaluating urban demographic and economic changes,informing policymaking and urban planning,and contributing to sustainable urban *** model can also serve as a foundation for future research on early-stage urban redevelopment detection and evaluation of the causes and impacts of urban redevelopment.

关键词： Urban redevelopment Urban sustainability Remote sensing Time-series analysis Machine learning

输水建筑物表面淡水壳菜防护涂层研发及适用性分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

水利学报 2024年第3期55卷 325-335页

作者：闫军涛张社荣马梓奡张吉康王超王枭华天津大学水利工程智能建设与运维全国重点实验室天津300072 天津大学建筑工程学院天津300072 中国南水北调集团中线有限公司北京100038

淡水壳菜附着在输水建筑物壁面会导致输水结构混凝土性能劣化、糙率增加等诸多严重问题,然而当前尚缺乏切实有效的防治对策。针对输水建筑物中淡水壳菜防治难题,研发了一种无毒新型淡水壳菜防护涂层,通过试验手段表征了涂层微结构、表... 详细信息

淡水壳菜附着在输水建筑物壁面会导致输水结构混凝土性能劣化、糙率增加等诸多严重问题,然而当前尚缺乏切实有效的防治对策。针对输水建筑物中淡水壳菜防治难题,研发了一种无毒新型淡水壳菜防护涂层,通过试验手段表征了涂层微结构、表面能、力学性能等;研究了淡水壳菜活体在涂层表面的行为特性,对比了研发涂层与6种现存涂层表面淡水壳菜的平均附着率和平均垂向分离力,深入分析了淡水壳菜在现存涂层表面的附着机理及研发涂层的防附着机理。结果表明:与6类无毒现存涂层中防附着效果较好的硅橡胶涂层相比,本文所研发涂层淡水壳菜平均附着率、平均垂向分离力分别下降58.33%,46.67%;与混凝土表面相比,涂层表面淡水壳菜平均附着率、平均垂向分离力分别下降80.26%,91.11%。研发涂层同时具备“低表面能”“微结构”“弹性”“低污损脱除参量”特点,污损脱除参数优于同类涂层。本研究可为输水建筑物中淡水壳菜防护涂层选择与性能分析提供参考,对淡水壳菜防治提供一种新路径。

关键词：淡水壳菜防护涂层微结构垂向分离力污损脱除

新校区的景观传承与需求——以北京交通大学雄安新校区为例

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

西安建筑科技大学学报（自然科学版） 2024年第4期56卷 613-622页

作者：王子翱刘贺丹何若萌蒙小英北京交通大学建筑与艺术学院北京100091

在好风景里做学问是传统书院的宗旨.雄安新区规划建设的大学城片区首批新校区规划建设正在进行中,校园景观作为师生最直接、最高频使用和感受校园氛围与文化的五感来源,是新校区建设的重要内容.新校区景观如何传承主校区历史文脉,营造... 详细信息

在好风景里做学问是传统书院的宗旨.雄安新区规划建设的大学城片区首批新校区规划建设正在进行中,校园景观作为师生最直接、最高频使用和感受校园氛围与文化的五感来源,是新校区建设的重要内容.新校区景观如何传承主校区历史文脉,营造师生需求下的好风景:以北京交通大学雄安新校区为例,研究通过对北交大在校生和校友们的问卷调查与访谈,以北交大主校区特征景观感知、学生们需求和期望的理想校园景观进行分项专题问卷调查,研究成果显示:(1)对主校区特征景观的传承,进行多校区间的校园景观延续设计,有利于校园文化环境的营造.(2)可进入的草坪空间,林下可停留空间,有一定私密感的空间,减压沉思冥想空间和亲水空间是校园室外空间最被期待的环境形式.(3)在水景、植物等校园室外空间景观元素的使用中,结合传统书院景观的环境育人、比德教化作用,将伦理教化融入校园环境中,丰富高校人文内涵.这些偏好与评价结果,可在北京市存量空间紧缺以及雄安新城增量发展的时代背景下为新校区景观规划建设及主校区局部空间更新提供支持与参考.

关键词：新校区校园景观传统书院理想室外空间冥想空间

考虑换电需求响应的换电站参与电能量-调频市场竞价策略

在线全文

学校读者我要写书评

暂无评论

电力系统自动化 2024年第8期48卷 207-215页

作者：李咸善詹梓澳李飞张磊梯级水电站运行与控制湖北省重点实验室(三峡大学) 湖北省宜昌市443002 三峡大学电气与新能源学院湖北省宜昌市443002

电动汽车(EV)大规模发展会加大电网的调峰调频压力。通过换电站市场化运营,可有效激励换电站利用EV换电需求和换电站电池灵活性资源,缓解电网调峰调频压力。为此,提出了换电站参与电能量市场和调频辅助服务市场的协同竞价策略及其两阶... 详细信息

电动汽车(EV)大规模发展会加大电网的调峰调频压力。通过换电站市场化运营,可有效激励换电站利用EV换电需求和换电站电池灵活性资源,缓解电网调峰调频压力。为此,提出了换电站参与电能量市场和调频辅助服务市场的协同竞价策略及其两阶段优化模型。第1阶段依据调频市场需求制定换电价格,引导EV调整换电需求,优化冗余电池数量及时序,以便与调频需求趋势一致,进而提升换电站调频服务收益;第2阶段考虑换电站需求响应和市场调峰调频需求,制定换电站竞价策略。所提出竞价策略在优先满足EV换电需求的同时,可降低换电站充电成本、提升调频服务收益,并助力电网调峰调频。算例仿真结果验证了所提策略的有效性。

关键词：电动汽车(EV) 换电站电力市场调频辅助服务竞价策略